“Corrugated wheels” - been there, done that :

http://www.douglas-self.com/MUSEUM/LOCOLOCO/polygon/polygon.htm http://www..douglas-self.com/MUSEUM/LOCOLOCO/polygon/polygon.htm

Note tramway reference in last paragraph.

Tony G

> On 23 May 2017, at 11:17 am, Mal Rowemal.rowe@... [TramsDownUnder] TramsDownUnder@...> wrote:

>

>

> On 23/05/2017 7:48 AM, Richard Youltressteleg@... mailto:tressteleg@yahoo.com.au [TramsDownUnder] wrote:

>>

>>

>> It is interesting, Mal, that you mention wheel corrugations. It is something I have never heard anyone else mention before but have long believed that it occurs.

>>

> My reference to 'wheel corrugations' was tongue in cheek!

>

> The D2s have a major problem with the wheels of the unpowered centre truck locking up on the disc brakes just before the tram stops.

> This leads to multiple small 'flats' and makes them very noisy - until they are put over the wheel lathe.

>

> I thought that the problem had been solved, but recent observations (noisy trams in Sydney Rd) indicate that this is not the case.

>

> Mal Rowe - in B class country

>

>